My shoe size isnt that big, my feet arent terribly big, they're not what i want them to be but not caveman size or bigfoot size. I forgot what shoe size i have exactly, its been a long time since i got new shoes...but i could check.
Your height and shoe size doesnt matter for transitioning, dont let that discourage you. It's what you want your outward appearance to match up with what you really are inside, not the other way around.